CN101316401A - Mobile phone system based on radio frequency recognition principle - Google Patents
Mobile phone system based on radio frequency recognition principle Download PDFInfo
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- CN101316401A CN101316401A CNA2007100998662A CN200710099866A CN101316401A CN 101316401 A CN101316401 A CN 101316401A CN A2007100998662 A CNA2007100998662 A CN A2007100998662A CN 200710099866 A CN200710099866 A CN 200710099866A CN 101316401 A CN101316401 A CN 101316401A
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Abstract
The invention discloses a mobile phone system based on the principle of radio frequency identification, relating to the technology of input equipment of mobile phones. The mobile phone system of the invention comprises a second keyboard based on an electronic tag circuit and a mobile phone section, the second keyboard is not contacted with the mobile phone and sends data to the mobile phone in a radio frequency way. The mobile phone system of the invention utilizes the automatic identification function of a read-write module in the mobile phone to an electronic tag and the uniqueness of the unique coding of the electronic tag to integrate a plurality of the electronic tags into the keyboard to cause the unique coding of each electronic tag to be corresponded as a keyboard input signal. A key switch can be used for controlling whether the electronic tags operate. After a key is pressed, corresponding electronic tag information can be converted into the key input of the mobile phone, thereby realizing the quick input function of mobile phone information. The mobile phone system of the invention utilizes the characteristics of the radio frequency identification technology to realize the keyboard of the mobile phone with no power supply, fast connection and configuration and portability and can effectively increase the input speed, thereby solving the problem of inconvenient input of the keyboard of the mobile phone.
Description
Technical field
The present invention relates to the input equipment technical field, portable input keyboard of particularly a kind of mobile phone and system mainly are a kind of cell phone systems based on radio frequency recognition principle.
Background technology
Radio-frequency (RF) identification (RFID) technology is a kind of non-contact automatic identification technology of realizing based on radio frequency principle.The most basic radio-frequency (RF) identification (RFID) system consists of the following components: the upper system of electronic tag, read write line and read write line.The operation principle of radio-frequency (RF) identification (RFID) system is as follows: read write line is by the radiofrequency signal of transmitting antenna scattering certain frequency, when electronic tag enters the transmitting antenna working region, respond to this radiofrequency signal and produce induced current, and therefrom extract energy activated circuit own; The electronic tag that is in state of activation returns with himself coding by the built-in transmitting antenna of label and waits the carrier signal of the information that needs transmission as answer signal; System's reception antenna receives the carrier signal that electronic tag returns, and is returned to read write line through the antenna adjustments device; Being sent to the backstage main system behind the signal that read write line demodulation sign indicating number receives filters and authenticates; Main system receives information that read write line transmits and judges the legitimacy of this electronic tag according to logical operation, and handles accordingly or send the action of command signal control executing mechanism according to different set.
In recent years, developing rapidly and extensive use of REID made and produced multiple new technology that combines with it and new product on the market.The NFC technology is a kind of technology based on radio frequency recognition principle, need not manual intervention, and it just can and obtain the related data of destination object by the automatic recognition objective object of radiofrequency signal.2006, cell phone manufacturer has released the mobile phone products of module for reading and writing such as integrated RF identification (RFID) and NFC, it discerns the function of electronic tag by add the realization of radio-frequency (RF) identification (RFID) or NFC module in mobile phone circuit, and data that receive are sent to embedded system of mobile phone.
The development of mobile phone technique, experienced volume from big to small with the function process of two aspects from small to large: the first, aspect volume structure, initial volume is too fat to move to develop into present flexible small and exquisite and high integration; The second, in function aspects, initial simple functionality mobile communication develops into and integrates communication, amusement, commercial affairs, medium and data processing function now.Along with becoming stronger day by day of cell-phone function, enriching constantly of mobile platform software occurred on mobile phone such as multiple application such as network browsing, Email, word processing, data processing, and this application scenario needs the user to a large amount of information of mobile phone input.Yet mobile phone products in the market seldom has the full keyboard design, because major applications only needs a spot of input operation, though full keyboard designs input information fast, to increase considerably the volume of product, influencing it portable is cost.Therefore, what cell phone manufacturer extensively adopted is the method for button multiplexing, and this keyboard design is to make the corresponding a plurality of letters of each button, numbers and symbols, by continuous touch potential input character is selected.So just reduced the quantity of button, to guarantee the volume of whole mobile phone.And in some special applications---as write e-mail or document---in, the drawback of button multiplexing method also just comes out: this design has influenced the speed and the efficient of input greatly.Therefore, need a kind of mobile phone body that is independent of, do not influence its portability, can be attached thereto the input equipment that connects quickly and easily again.
Combining closely of these two technology of mobile phone and radio-frequency (RF) identification obtained and imports the means that provide new for information.The mobile phone that comprises radio-frequency (RF) identification (RFID) or NFC module can be used to read and write electronic tag it as a kind of automatic identification equipment on the one hand; On the other hand, because each electronic tag all has a unique coding,, just can be used as a kind of input equipment to electronic tag, to mobile phone input instruction and information if it is corresponding one by one that this unique coding and specific function button are realized.For the mobile phone that comprises radio-frequency (RF) identification (RFID) or NFC module, make unique coding of some electronic tags corresponding with the button on the keyboard respectively, after some electronic tags are by artificial the activation, unique coding that radio-frequency (RF) identification in the mobile phone (RFID) or NFC module will be read is mapped as by key input signal, just can realize a kind of portable keyboard based on radio frequency recognition principle.
Summary of the invention
The objective of the invention is in order to satisfy the demand of quick input in the application of part mobile phone, avoid increasing the mobile phone body volume simultaneously, a kind of portable folding keyboard based on radio frequency recognition principle is proposed, can be applicable to comprise the mobile phone of radio-frequency (RF) identification (RFID) or NFC module, with effective raising input speed, solve the problem of present cell phone keyboard input inconvenience.
For achieving the above object, technical solution of the present invention is:
A kind of cell phone system based on radio frequency recognition principle, it comprises based on second keyboard of electronic tag circuit and mobile phone two parts, mobile phone has all functions of existing mobile phone, second keyboard and mobile phone are noncontacts, second keyboard sends data by wireless radio frequency mode to mobile phone, driver module is installed in the mobile phone operating system, is the input of second keypad character with the data map that receives; Wherein,
Second keyboard comprises key switch, label chip, label antenna, flexible PCB and shell, key switch, label chip are fixed on a slice flexible PCB, key switch and the corresponding one by one electrical connection of label chip, constitute a working cell, at least two of the quantity of working cell, each key switch is electrically connected at two label antennas respectively by flexible PCB, constitutes second keyboard circuit; Each parts group is located in the cavity of a shell formation, supports and protect this circuit by shell;
Mobile phone comprises hardware module unit, hardware driving unit, embedded OS and upper layer application unit, and each several part is electrically connected in proper order; Comprise at least one radio-frequency (RF) identification/NFC module in the hardware module unit, comprise at least one second keyboard drive module in the hardware driving unit;
Radio-frequency (RF) identification in the label antenna of second keyboard and the mobile phone hardware modular unit/NFC module is carried out the double-direction radio communication.
Described system, its described second keyboard is the mobile phone portable folding keyboard based on radio frequency recognition principle, its work institute energy requirement is supplied with from the radiofrequency signal that mobile phone radio frequency is discerned or the NFC module is launched fully.
Described system, its described mobile phone portable folding keyboard, its shell is divided into two parts, and the relative ora terminalis of two parts is dynamically connected, and two parts are opened to put down and are established operation in use, when not using, can fold relatively and pack up, to be convenient for carrying; Shell one side is provided with the sheet support, and support and shell are dynamically connected, and in use, opens an angle, places mobile phone, when not using, can fold relatively and pack up, to reduce volume; Two label antennas are fixedly arranged on the support.
Described system, its described label chip operating frequency, communications protocol are all identical with mobile phone radio frequency identification or NFC module, and each label chip is stored a unique coding respectively, and has two external contacts.
Described system, the impedance of its described label antenna equals the combined characteristic impedance of key switch and flexible PCB.
Described system, its described key switch, be divided into function key area and Alphanumeric keypad, respectively comprise the working cell that most key switches and label chip constitute in two keypads, between label chip and the label antenna, the closure by key switch and opening being communicated with and disconnection of control label chip and label antenna.
Described system, its described flexible PCB and key switch are corresponding to be divided into Alphanumeric keypad and function key area with keyboard circuit.
Described system, in its described Alphanumeric keypad, the layout of key switch is identical with the Standard PC keyboard.
Described system, its described key switch during operation, allows to carry out three kinds of operations that single character keys is pressed, the individual feature key is pressed or single character keys and individual feature key are pressed simultaneously; When two or more character keys were pressed, Alphanumeric keypad lost efficacy; When two or more function keys were pressed, function key area lost efficacy.
Described system, its described second keyboard drive module comprises keyboard map table, filtering module and module three parts is set; The keyboard map table is used for depositing the corresponding relation of unique coding of electronic tag and the instruction of mobile phone embedded OS keyboard input interface; Filtering module is monitored from the unique coding of electronic tag of mobile phone radio frequency identification or the submission of NFC module, compare with the keyboard map table, when finding that this unique encoded packets is contained in the table, then intercept this unique coding, the keyboard input interface instruction that is converted in the keyboard map table correspondingly sends to the mobile phone embedded OS, if this unique coding is not included in the table, then do not change, it is directly sent to the mobile phone embedded OS as the conventional electrical label data; The data that module is used for creating new keyboard map table or revises existing keyboard map table are set, determine the corresponding relation of the unique coding of electronic tag and keyboard input interface instruction, realization is to the support of portable keyboard button and redefine.
Advantage of the present invention:
A. transmit energy with wireless mode, need not external power supply or battery is installed;
B. with the wireless mode Data transmission, easy for installation, as long as in embedded system of mobile phone, install and configure driver module, mobile phone and keyboard are in the read range, just can use, need not carry out hardware with mobile phone and be connected;
C. the setting of key position is identical with the PC keyboard, the convenient use;
D. hardware components adopts collapsible and the flexible PCB design, is easy to carry;
Only need when e. changing keyboard driver module just simply is provided with and can supports, the keyboard that is not configured does not have operating right to mobile phone, only handles as routine data;
F. support Macintosh, make things convenient for the User Defined operation.
The present invention has realized a kind of mobile phone portable folding keyboard based on radio frequency recognition principle, can when importing bulk information, install and use rapidly by mobile phone at needs, replace the original keyboard of mobile phone, realize text message input fast and efficiently, unwanted the time, its folding closing can also be carried.Along with combining closely and application of mobile phone and REID, become a kind of Portable mobile phone input equipment of standard.
Description of drawings
Fig. 1 is the mobile phone system structure principle schematic based on radio frequency recognition principle of the present invention;
Fig. 2 is the portable folding second keyboard schematic diagram in the cell phone system of the present invention; Wherein: Fig. 2 (a) is a front view; Fig. 2 (b) is a vertical view; Fig. 2 (c) is a support;
Fig. 3 is a flexible PCB schematic diagram in the cell phone system of the present invention;
Fig. 4 is the portable second keyboard drive module fundamental diagram of the present invention.
Embodiment
Principle of the present invention is as follows:
By forming based on the keyboard hardware of electronic tag circuit and the read-write drive part in the mobile phone, wherein second keyboard does not have hardware with the mobile phone with radio-frequency (RF) identification (RFID) or NFC module and is connected, send data by wireless radio frequency mode, driver module is installed in the mobile phone, and the data map that is used for that mobile phone is received is the keypad character input.
Foregoing portable folding second keyboard based on radio frequency recognition principle does not need the power supply of extra power supply, and its work institute energy requirement is supplied with from the radiofrequency signal that mobile phone radio frequency identification (RFID) or NFC module are launched fully.
Foregoing portable folding second keyboard based on radio frequency recognition principle is made of jointly two or more key switches, label chip, a slice flexible PCB, two label antennas and a shell that quantity is identical with key switch; each key switch links to each other with a label chip respectively; the two is connected on the flexible PCB in pairs; flexible PCB links to each other with label antenna; they constitute the keyboard hardware circuit, and shell is used for supporting and the protection hardware circuit.
Foregoing portable folding second keyboard based on radio frequency recognition principle, its label chip operating frequency, communications protocol are all identical with mobile phone radio frequency identification (RFID) or NFC module, each label chip is stored a unique coding respectively, and has two external contacts.
Foregoing portable folding second keyboard based on radio frequency recognition principle, the impedance of its label antenna equals the combined characteristic impedance of key switch and flexible PCB.
Foregoing portable folding second keyboard based on radio frequency recognition principle, its label chip directly is not connected with label chip, the closure by key switch and opening being communicated with and disconnection of control label chip and label antenna.
Foregoing portable folding second keyboard based on radio frequency recognition principle, its flexible PCB is divided into Alphanumeric keypad and function key area with keyboard circuit, and the button setting of keyboard also correspondingly is divided into character keys and function key.
Foregoing portable folding second keyboard based on radio frequency recognition principle, its Alphanumeric keypad keyswitch layout is identical with the Standard PC keyboard.
Foregoing portable folding second keyboard based on radio frequency recognition principle, its button allow to carry out single character keys is pressed, the individual feature key is pressed and single character keys and individual feature key are pressed simultaneously three kinds of operations; When two or more character keys were pressed, Alphanumeric keypad lost efficacy; When two or more function keys were pressed, function key area lost efficacy.
Foregoing portable folding second keyboard based on radio frequency recognition principle, its housing designs is collapsible mode, to be convenient for carrying.
Foregoing portable folding keyboard drive module section based on radio frequency recognition principle, be installed in the mobile phone embedded OS that comprises radio-frequency (RF) identification (RFID) or NFC module, comprise keyboard map table, filtering module and module three parts be set that wherein the keyboard map table is used for depositing the corresponding relation of unique coding of electronic tag and the instruction of mobile phone embedded OS keyboard input interface; Filtering module is monitored from the unique coding of electronic tag of mobile phone radio frequency identification (RFID) or the submission of NFC module, compare with the keyboard map table, when finding that this unique encoded packets is contained in the table, then intercept this unique coding, the keyboard input interface instruction that is converted in the keyboard map table correspondingly sends to the mobile phone embedded OS, if this unique coding is not included in the table, then do not change, it is directly sent to the mobile phone embedded OS as the conventional electrical label data; The data that module is used for creating new keyboard map table or revises existing keyboard map table are set, determine the corresponding relation of the unique coding of electronic tag and keyboard input interface instruction, realization is to the support of portable keyboard button and redefine.
Below in conjunction with accompanying drawing the present invention is described in detail.
Among Fig. 1:
Each several part is respectively: portable second keyboard 1, label chip 2, key switch 3, label antenna 4, mobile phone 5, radio-frequency (RF) identification (RFID)/NFC module 6, portable keyboard driver module 7, embedded OS 8, upper layer application 9, hardware driving 10, hardware module 11, function key area 12, Alphanumeric keypad 13.
Wherein mobile phone 5 comprises hardware module 11, hardware driving 10, embedded OS 8 and upper layer application 9 four parts, in the hardware module 11 except that common mobile phone hardware circuit also integrated radio-frequency (RF) identification (RFID)/NFC module 6, they realize different hardware capabilitys respectively, as communication, demonstration, sounding, read information etc.; Hardware driving 10 is used to drive each hardware module 11, and it accepts the hardware operation instruction that embedded OS 8 sends, and control hardware module 11 is made response, and the information of hardware module 11 is returned to embedded OS 8; Embedded OS 8 centralized management hardware driving 10, and provide unified DLL (dynamic link library) for upper layer application 9; Upper layer application 9 is mounted in the application software on the embedded OS 8, and it is controlled each hardware module by the interface that calls embedded OS 8 and finishes specific application, as communication, media play, lteral data processing etc.
Its course of work is as follows, when certain key switch 3 is pressed, the continuous label chip 2 of switch is just connected with label antenna 4 and is formed a complete electronic tag circuit therewith, the radio-frequency (RF) identification of mobile phone 5 (RFID)/NFC module 6 reads unique coding of this electronic tag by RF-wise, upwards pass to hardware driving 10, portable keyboard driver module 7 wherein is that key information sends to embedded OS 8 with the unique code conversion of this electronic tag, operating system has just been received a character or operating key input, and the upper layer application 9 that is installed in the operating system can be made corresponding action to this input.If function key area 12 and Alphanumeric keypad 13 respectively have a key switch 3 to be pressed, then have this moment two label chips 2 respectively with function key area 12 and Alphanumeric keypad 13 in label antenna 4 connect, two complete electronic tag circuit have been formed, the radio-frequency (RF) identification of mobile phone 5 (RFID)/NFC module 6 can be read two labels, portable keyboard driver module 7 can send to embedded OS 8 for the Macintosh input signal with these two unique code conversion of electronic tag, so upper layer application 9 has just received a Macintosh input signal by operating system.
Among Fig. 2:
Each several part is respectively: label chip 2, key switch 3, label antenna 4, flexible PCB 14, shell 15, support 16.
Wherein label chip 2 is used to store a unique unique coding; whether the label chip 2 that key switch 3 controls are attached thereto is connected with label antenna 4; flexible PCB 14 is used for mounting arrangements label chip 2, key switch 3, label antenna 4 and other peripheral circuits; shell 15 is used for installation, support and protective circuit structure; support 16 is used in use placing mobile phone; obsolete the time; can shell 15 is folding from the centre; support 16 also can fold in the shell 15, thereby is convenient for carrying.
Among Fig. 3:
Each several part is respectively: label chip 2, key switch 3, label antenna 4, flexible PCB basic unit 17, printed circuit cable 18.
Wherein flexible PCB basic unit 17 is carriers of circuit, and 18 of printed circuit cables are used for connecting label chip 2, key switch 3 and label antenna 4.
It should be explicitly made clear at this point: Fig. 3 is the schematic diagram painted of the principle of the invention for convenience of description just, and protection range of the present invention is not limited to the sort circuit structure described in the figure.
Among Fig. 4:
Each several part is respectively: radio-frequency (RF) identification (RFID)/NFC module 6, and portable keyboard driver module 7, embedded OS 8, is provided with module 21 at filtering module 19, keyboard map table 20.
Wherein the filtering module 19 in the portable keyboard driver module 7 is used for filtering the unique coding of electronic tag from radio-frequency (RF) identification (RFID)/NFC module 6 sends, and finish conversion according to keyboard map table 20, keyboard map table 20 is used for the corresponding informance between unique coding of store electrons label and the button, use for filtering module 19, module 21 is set is used to revise keyboard map table 20 canned data, realization is to the self-defined of button and support new keyboard.
Its course of work is as follows: in use, after radio-frequency (RF) identification (RFID)/NFC module 6 reads the unique coding of electronic tag, can send this unique coding to embedded OS 8, at this moment, filtering module 19 can be tackled this information, this unique coding and keyboard map table 20 are compared, if unique coding appears in the keyboard map table 20, then this information is revised as keyboard input signal according to the record in the table, send to embedded OS 8, if this unique coding is not in keyboard map table 20, then filtering module 19 does not carry out any change to it, and it is sent to embedded OS 8 with the conventional electrical label data; User-defined press key, when changing button or keyboard, then start module 21 is set, it can read the data in the keyboard map table 20 and display it, the user can revise the corresponding relation between push button signalling and the unique coding of electronic tag, after preserving, new corresponding relation can come into force, thereby finishes to the self-defining operation of button or to the support of new keyboard, button.
Describing above is to be used to realize embodiments of the invention; scope of the present invention should not described by this and limit; it should be appreciated by those skilled in the art,, all belong to the scope of claim protection of the present invention in any modification or partial replacement that does not depart from the scope of the present invention.
The portable keyboard that system of the present invention realized, its application also is not limited to the input equipment as mobile phone, in theory, any equipment that comprises module for reading and writing, can be with portable keyboard that the present invention realized as input equipment, its design principle is identical with the above-mentioned portable keyboard principle that is used for mobile phone, and specific implementation can be carried out necessary adjustment according to demand.
Claims (10)
1, a kind of cell phone system based on radio frequency recognition principle, it is characterized in that: comprise second keyboard and mobile phone two parts based on the electronic tag circuit, mobile phone has all functions of existing mobile phone, second keyboard and mobile phone are noncontacts, second keyboard sends data by wireless radio frequency mode to mobile phone, driver module is installed in the mobile phone operating system, is the input of second keypad character with the data map that receives; Wherein,
Second keyboard comprises key switch, label chip, label antenna, flexible PCB and shell, key switch, label chip are fixed on a slice flexible PCB, key switch and the corresponding one by one electrical connection of label chip, constitute a working cell, at least two of the quantity of working cell, each key switch is electrically connected at two label antennas respectively by flexible PCB, constitutes second keyboard circuit; Each parts group is located in the cavity of a shell formation, supports and protect this circuit by shell;
Mobile phone comprises hardware module unit, hardware driving unit, embedded OS and upper layer application unit, and each several part is electrically connected in proper order; Comprise at least one radio-frequency (RF) identification/NFC module in the hardware module unit, comprise at least one second keyboard drive module in the hardware driving unit;
The label antenna of second keyboard respectively with each mobile phone hardware modular unit in radio-frequency (RF) identification/NFC module carry out the double-direction radio communication.
2, the system as claimed in claim 1 is characterized in that: described second keyboard, be mobile phone portable folding keyboard based on radio frequency recognition principle, and its work institute energy requirement is supplied with from the radiofrequency signal that mobile phone radio frequency is discerned or the NFC module is launched fully.
3, system as claimed in claim 1 or 2 is characterized in that: described mobile phone portable folding keyboard, and its shell is divided into two parts, the relative ora terminalis of two parts is dynamically connected, and two parts are opened the flat operation of establishing in use, when not using, can fold relatively and pack up, to be convenient for carrying; Shell one side is provided with the sheet support, and support and shell are dynamically connected, and in use, opens an angle, places mobile phone, when not using, can fold relatively and pack up, to reduce volume; Two label antennas are fixedly arranged on the support.
4, the system as claimed in claim 1 is characterized in that: described label chip operating frequency, communications protocol are all identical with mobile phone radio frequency identification or NFC module, and each label chip is stored a unique coding respectively, and has two external contacts.
5, as claim 1 or 3 described systems, it is characterized in that: the impedance of described label antenna equals the combined characteristic impedance of key switch and flexible PCB.
6, the system as claimed in claim 1, it is characterized in that: described key switch, be divided into function key area and Alphanumeric keypad, respectively comprise the working cell that most key switches and label chip constitute in two keypads, between label chip and the label antenna, the closure by key switch and opening being communicated with and disconnection of control label chip and label antenna.
7, the system as claimed in claim 1 is characterized in that: described flexible PCB and key switch are corresponding to be divided into Alphanumeric keypad and function key area with keyboard circuit.
8, as claim 6 or 7 described systems, it is characterized in that: in the described Alphanumeric keypad, the layout of key switch is identical with the Standard PC keyboard.
9, the system as claimed in claim 1 is characterized in that: described key switch during operation, allows to carry out three kinds of operations that single character keys is pressed, the individual feature key is pressed or single character keys and individual feature key are pressed simultaneously; When two or more character keys were pressed, Alphanumeric keypad lost efficacy; When two or more function keys were pressed, function key area lost efficacy.
10, the system as claimed in claim 1 is characterized in that: the described second keyboard drive module comprises keyboard map table, filtering module and module three parts is set; The keyboard map table is used for depositing the corresponding relation of unique coding of electronic tag and the instruction of mobile phone embedded OS keyboard input interface; Filtering module is monitored from the unique coding of electronic tag of mobile phone radio frequency identification or the submission of NFC module, compare with the keyboard map table, when finding that this unique encoded packets is contained in the table, then intercept this unique coding, the keyboard input interface instruction that is converted in the keyboard map table correspondingly sends to the mobile phone embedded OS, if this unique coding is not included in the table, then do not change, it is directly sent to the mobile phone embedded OS as the conventional electrical label data; The data that module is used for creating new keyboard map table or revises existing keyboard map table are set, determine the corresponding relation of the unique coding of electronic tag and keyboard input interface instruction, realization is to the support of portable keyboard button and redefine.
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| CN2007100998662A CN101316401B (en) | 2007-05-31 | 2007-05-31 | Mobile phone system based on radio frequency recognition principle |
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| CN2007100998662A CN101316401B (en) | 2007-05-31 | 2007-05-31 | Mobile phone system based on radio frequency recognition principle |
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| WO2016065568A1 (en) | 2014-10-30 | 2016-05-06 | Microsoft Technology Licensing, Llc | Multi-configuration input device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1272741A (en) * | 1999-04-30 | 2000-11-08 | 英业达集团(上海)电子技术有限公司 | Handset with external keyboard |
| EP1549011A1 (en) * | 2003-12-26 | 2005-06-29 | Orange France | Communication method and system between a terminal and at least a communication device |
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2007
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| CN113792831A (en) * | 2021-09-02 | 2021-12-14 | 北京零态空间数码科技有限公司 | Multi-domain enhanced radio frequency identification device and communication method |
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